Merge pull request #686 from leethomason/issue647

Fix Query return type

tinyxml2.h

@@ -1402,27 +1402,27 @@ public:
     	QueryAttribute( "foo", &value );		// if "foo" isn't found, value will still be 10
     	@endverbatim
     */
-	int QueryAttribute( const char* name, int* value ) const {
+	XMLError QueryAttribute( const char* name, int* value ) const {
 		return QueryIntAttribute( name, value );
 	}
 
-	int QueryAttribute( const char* name, unsigned int* value ) const {
+	XMLError QueryAttribute( const char* name, unsigned int* value ) const {
 		return QueryUnsignedAttribute( name, value );
 	}
 
-	int QueryAttribute(const char* name, int64_t* value) const {
+	XMLError QueryAttribute(const char* name, int64_t* value) const {
 		return QueryInt64Attribute(name, value);
 	}
 
-	int QueryAttribute( const char* name, bool* value ) const {
+	XMLError QueryAttribute( const char* name, bool* value ) const {
 		return QueryBoolAttribute( name, value );
 	}
 
-	int QueryAttribute( const char* name, double* value ) const {
+	XMLError QueryAttribute( const char* name, double* value ) const {
 		return QueryDoubleAttribute( name, value );
 	}
 
-	int QueryAttribute( const char* name, float* value ) const {
+	XMLError QueryAttribute( const char* name, float* value ) const {
 		return QueryFloatAttribute( name, value );
 	}